JPH06122166A - Manufacture of weather strip ventilating opening part - Google Patents

Abstract

PURPOSE:To prevent a joining piece from deforming at the time of covering or forming of macromolecular material and prevent sealing performance of a weather strip from deteriorating when it is in use. CONSTITUTION:Both ends of the main body 15 of a joining piece 9 are fitted to one end and the other end of the sealing part of the leader of a weather strip which is obtained by extrusion molding. The right and left sides of the main body 15 of the piece are formed with thick walls, and the top and bottom walls are formed thinner. A supporting rod 26 is inserted into the inside of a ventilating opening 16 of the joining piece 9, and the apex of the rod contacts with the inner wall of the main body 15 of the piece and the bottom of the rod protrudes from the ventilating opening 16. A part of the joining piece 9 is installed within a mold 21, and rubber is injected into and filled in a cavity 25. At the time of forming, fluid pressure of rubber is applied to the main body 15 of the piece, but the main body 15 of the piece has rigidity in the direction of non-pressure welding and, at the same time, it has rigidity in the direction of pressure welding because of the supporting rod 26, and deformation of the main body 15 of the piece does not occur. And, the main body 15 of the piece has flexibility in the direction of pressure welding at the tine of its use.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a weather strip having a seal portion provided on, for example, a sliding roof of an automobile. The present invention relates to a method of manufacturing a weather strip intake / exhaust port portion.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 11, it is known that a sliding roof 52 such as a sunroof or a moonroof is provided in an opening of a ceiling 51 of an automobile. Generally, a weather strip 53 is arranged around the sliding roof 52. The weather strip 53 is provided with a hollow seal portion 54, and the seal portion 54 seals the gap between the sliding roof 52 and the opening.
The weather strip 53 prevents air from entering and exiting through the gap between the sliding roof 52 and the opening when the vehicle is running, and prevents rainwater from entering during rain.

Further, in recent years, in order to further improve the sealing performance of the weather strip 53 when the automobile is traveling at a high speed, a technique of pressurizing a gas into the seal portion 54 has been proposed (for example, Fairness 3-5
447 publication). In this type of technique, as shown in FIG. 12, a weather strip precursor 55 formed in a long shape is formed.
One end and the other end of the seal portion 54 are connected with the connection piece 56 interposed. The connection piece 56 includes a tubular piece body 57 and an intake / exhaust port 58 that projects from the piece body 57 in a tubular shape. Then, the weather strip precursor 55 and the connecting piece 56 are annularly connected by fitting both ends of the piece main body 57 to one end and the other end of the seal portion 54.

Subsequently, as shown in FIG. 13, the periphery of the piece main body 57 including the fitting portion is covered and molded in the mold 59 with the same material as the weather strip precursor 55. By this coating and molding, both 55 and 57 are firmly connected to each other, and the weather strip 53 having excellent design is obtained.

The weather strip 53 is attached to the periphery of the sliding roof 52, and when the sliding roof 52 is closed, gas pumped from a pump (not shown) is injected into the seal portion 54 from the intake / exhaust port 58. . As a result, the seal portion 54 expands, the opening portion and the seal portion 54 firmly come into close contact with each other, and generation of abnormal noise during high-speed traveling or the like is suppressed.

[0006]

However, the above-mentioned conventional techniques have the following problems. That is, if the piece body 57 of the connection piece 56 is formed of a flexible material, the piece body 57 is deformed by the flow pressure of the coating material in the coating / molding process in the mold 59 described above. There was a risk that As a result, the piece body 57 may block the gas passage when the weather strip 53 is used.

On the other hand, the piece body 57 of the connection piece 56.
When it is made of a rigid material, it is not deformed in the coating / molding process. However, this piece body 57
Is not easily deformed during use and has poor elasticity,
In the weather strip 53, the sealing force is reduced only in the portion of the piece main body 57.

The present invention has been made to solve the above-mentioned problems, and an object thereof is to be connected in an annular shape by fitting a connecting piece having an intake / exhaust port, and at least the fitting portion thereof. In a weather strip formed by coating and molding a polymer material, it is possible to prevent deformation of the connection piece during coating and molding of the polymer material,
Another object of the present invention is to provide a method for manufacturing a weatherstrip intake / exhaust port, which can prevent the sealing performance from deteriorating when the weatherstrip is used.

[0009]

In order to achieve the above object, the first invention of the present invention is to provide one end of the sealing portion of a weather strip precursor which is formed in an elongated shape and has a hollow sealing portion. With respect to the other end, a tubular piece body having rigidity in the non-pressing direction and having flexibility in the pressing direction,
Among the connection pieces provided with the intake and exhaust ports projecting cylindrically from the piece body, a step of connecting the weather strip precursor and the connection piece in an annular shape by fitting both ends of the piece body. , A support rod is inserted inside the intake / exhaust port so that the tip end abuts the inner wall of the piece body and the base end projects from the intake / exhaust port, and the support rod is fixed in the inserted state. A step of molding the support rod fixed to the inside of the intake / exhaust port by coating a polymer material on at least a fitting portion of the seal portion and the piece body, and after the molding is completed. And a step of pulling out the support rod from the inside of the intake / exhaust port, the gist is a method of manufacturing a weatherstrip intake / exhaust port part.

A second aspect of the present invention is formed in a long shape,
For one end and the other end of the sealing part of the weather strip precursor having a hollow sealing part, a tubular piece body having flexibility and an intake / exhaust port projecting cylindrically from the piece body are provided. Of the connecting pieces provided, by fitting both ends of the piece body, the step of connecting the weather strip precursor and the connecting piece in an annular shape, and the outline of the piece body fitted to the seal portion In a state in which both ends are closed, a step of pressurizing a gas or a liquid from the intake / exhaust port to apply tension to the connection piece and the seal portion, and a state in which tension is applied to the connection piece and the seal portion, At least a step of covering the fitting portion between the seal part and the piece main body with a polymer material and molding, and a step of releasing press-fitting of gas or liquid into the connection piece after completion of the molding. The method of manufacturing a weather strip intake and exhaust opening, characterized in that the are the gist thereof.

[0011]

According to the above construction, in the first invention,
Both ends of the piece body of the connection piece are fitted to one end and the other end of the seal portion of the weather strip precursor. As a result, the weather strip precursor and the connection piece are connected in an annular shape. Next, inside the intake / exhaust port, a support rod is inserted so that the distal end abuts the inner wall of the piece body and the base end projects from the intake / exhaust port, and the support rod is fixed in the inserted state. . Then, in the state where the support rod is fixed, at least the fitting portion between the seal portion and the piece body is coated with the polymer material and molded. After the molding is completed, the support rod is pulled out from the inside of the intake / exhaust port.

[0012] Here, even if pressure is applied to the piece body when the polymer material is coated and molded, the piece body has rigidity in the non-contact direction, and It is supported and fixed by a support rod almost in the pressing direction. Therefore, the piece body is hardly deformed.

Further, when the weather strip is used, the support rod is pulled out, and since the piece main body has flexibility in the pressure contact direction, it can be easily bent or expanded in the pressure contact direction. It becomes possible to do.

Further, in the second invention, both ends of the piece body of the connection piece are fitted to one end and the other end of the seal portion of the weather strip precursor. As a result, the weather strip precursor and the connection piece are connected in an annular shape. Next, gas or liquid is press-fitted from the intake / exhaust port in a state in which substantially both ends of the piece body fitted in the seal portion are closed. As a result, tension is applied to the connection piece and the seal portion. Then, in a state where tension is applied to the connection piece and the seal portion, at least the fitting portion between the seal portion and the piece body is coated with a polymer material and molded. After completion of the molding, the press-fitting of gas or liquid into the connection piece is released.

Here, when the polymer material is coated and molded, even if a pressure by the polymer material is applied to the body of the piece, tension is applied to the connection piece and the seal portion. Therefore, the piece body has a predetermined rigidity and is hardly deformed.

Further, when the weather strip is used, the gas is not press-fitted into the connection piece, and the piece body has flexibility, so that it can be easily bent or expanded. Becomes

[0017]

【Example】

(First Embodiment) A first embodiment of the first invention will be described below with reference to FIGS.

As shown in FIGS. 2 and 3, a substantially rectangular opening 3 is formed in the ceiling portion 2 of the automobile 1, and the opening 3 is slid in the front-rear direction of the automobile 1. A sliding roof 4 capable of opening and closing 3 is provided. The sliding roof 4 includes a transparent and substantially rectangular glass plate 5, a weather strip 6 mounted around the glass plate 5, and a metal slide for supporting the glass plate 5 and the weather strip 6. And a panel 7.

As shown in FIGS. 3 and 4, the weather strip 6 has a long weather strip precursor 8 and a connecting piece 9 for connecting one end and the other end of the precursor 8 to each other. A covering portion 10 formed so as to cover the periphery of the piece 9.
Composed of and. The weather strip precursor 8 is EPD
It is made of M (ethylene-propylene-diene copolymer rubber) solid rubber. The weather strip precursor 8 includes a hollow seal portion 11, a lip portion 12 extending downward from the seal portion 11, a glass fitting portion 13 having an inverted U-shaped cross section, a seal portion 11 and a glass fitting portion. And a slide panel fitting portion 14 formed by the portion 13. The glass plate 5 is fitted in the glass fitting portion 13, and the slide panel 7 is fitted in the slide panel fitting portion 14, which are fixed so as not to move.

Further, as shown in FIG. 5, the connection piece 9 is made of PVC (polyvinyl chloride), and has a tubular piece body 15 formed in an oval cross section and a center of the piece body 15. And an intake / exhaust port 16 protruding from the portion in a tubular shape. The tip of the intake / exhaust port 16 and the piece body 1
The inside of 5 is connected. The left and right side portions of the piece body 15 are formed thick, and the upper and lower portions are formed thin. That is, the piece body 15 has rigidity in the non-pressing direction of the weather strip 6 (vertical direction in the drawing) and flexibility in the pressing direction (horizontal direction in the drawing). The weather strip precursor 8 and the connection piece 9 are annularly connected by fitting both ends of the piece body 15 to one end and the other end of the seal portion 11.

Further, like the weather strip precursor 8, the covering portion 10 is made of EPDM solid rubber and has a cross-sectional shape almost equal to that of the weather strip precursor 8. In addition, in the covering portion 10, a part of a portion corresponding to the glass fitting portion 13 is cut out so as not to hinder the projection of the intake / exhaust port 16 of the connection piece 9.

A pump (not shown) is provided on the ceiling portion 2, and the pump is connected to the intake / exhaust port 16 via a hose (not shown). Then, when the sliding roof 4 is closed, the gas from the pump is pressure-fed to the intake / exhaust port 16 via the hose and injected into the seal portion 11 from the intake / exhaust port 16. By this injection, the seal portion 11 of the weather strip 6 expands. For this reason, the opening 3 and the seal portion 11 are firmly brought into close contact with each other, and the generation of abnormal noise during high-speed traveling is suppressed.

Next, a mold for molding the above-mentioned covering portion 10 will be briefly described. As shown in FIG. 1, the mold 21 is composed of a lower mold 22, an upper mold 23, and a middle mold 24, and a cavity 25 for molding the covering portion 10 is formed by these molds 22 to 24. . Then, the connection piece 9 can be installed at a predetermined position in the die 21 formed in this way.

Now, a method of manufacturing the weather strip 6 having the above-mentioned structure, particularly the intake / exhaust port 16 and its vicinity will be described. First, by a known extrusion molding method, a weather strip precursor 8 having a long shape and cut into a predetermined length is obtained.

Then, as shown in FIG. 5, both ends of the piece body 15 of the connecting piece 9 are fitted to one end and the other end of the seal portion 11 of the weather strip precursor 8. As a result, the weather strip precursor 8 and the connection piece 9 are annularly connected.

Next, as shown in FIG. 1, the support rod 26 is inserted into the intake / exhaust port 16. At this time, the support rod 26
It is necessary that the tip end of the contact point abut on the inner wall of the piece body 15 and the base end thereof protrudes from the intake / exhaust port 16. However, the support rod 26 is thick enough to generate a frictional force between the support rod 26 and the inner surface of the intake / exhaust port 16. Therefore, due to the frictional force, the support rod 26 is fixed in the inserted state.

Then, the weather strip precursor 8 and the connecting piece 9 which are annularly connected with the support rod 26 inserted and fixed are subjected to the subsequent coating / forming step. That is, the portion of the connection piece 9 is installed in the mold 21 described above, and the intake / exhaust port 16 and the support rod 26 are set. Then, the melted EPDM solid rubber is injected into the cavity 25 from a gate (not shown). Then, the injection of the rubber is continued for a certain period of time to fill the cavity 25 with the rubber as shown in FIG. After the molding is completed, the weather strip precursor 8 and the connection piece 9 are taken out from the mold 21, and the support rod 26 is taken out from the inside of the intake / exhaust port 16. In this way, as shown in FIG. 4, the weather strip 6 having an annular shape and having the intake and exhaust ports 16 is obtained.

Here, when the EPDM solid rubber is coated and molded, the flow pressure of the rubber is changed to the piece main body 15.
Added to. However, in this embodiment, the piece body 15
Since the left and right sides are formed thick, they have rigidity in the non-pressure contact direction of the weather strip 6. Further, since the piece main body 15 is supported and fixed by the support rod 26, it has rigidity substantially in the pressure contact direction (left and right direction in the drawing). Therefore, even if the flow pressure of rubber is applied to the piece body 15, the piece body 15 is hardly deformed. Therefore, there is no possibility that the gas passage is blocked by the deformation of the piece body 15.

Further, at the stage of using the weather strip 6, the support rod 26 has already been pulled out, and since the upper and lower parts of the piece body 15 are formed thin, the piece body 15 has flexibility in the pressure contact direction. Have Therefore, the weather strip 6 can be easily bent or bulged in the pressure contact direction even in the portion where the piece body 15 is present, and a sufficient sealing property can be ensured even during high-speed traveling. it can.

Further, in the present embodiment, the covering portion 10 is formed so as to hide the piece main body 15, and the covering portion 10 has an external shape substantially equivalent to that of the weather strip precursor 8. , Its connection is difficult to identify. Therefore, the appearance of the weather strip 6 can be improved as compared with the case where the covering portion 10 is not formed.
Further, since the covering portion 10 is also covered on the fitting portion, the covering portion 10 serves as an adhesive. Therefore, the joined state of the fitting portion can be made stronger.

(Second Embodiment) A second embodiment of the second invention will be described below with reference to FIGS. However,
In this embodiment, the same members as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted. Only different points will be described.

In this embodiment, as shown in FIG.
The piece body 32 of the connection piece 31 is formed to have a substantially equal thickness at any place and has flexibility as a whole, which is a great difference from the first embodiment. Moreover, the piece body 32 is formed longer than the piece body 15 of the first embodiment.

Further, a mold 3 for molding the covering portion 10
3 can be the same as the mold 21 of the first embodiment, but as shown in FIG. 9, on both sides of the mold 33,
This is different from the first embodiment in that clampers 34 and 35 capable of firmly sandwiching the weather strip precursor 8 are provided. Further, the mold 33 is provided with an air pressure feeding device (not shown) so that air can be pressure fed from the air pressure feeding device into the intake / exhaust port 16.

Next, a characteristic part of the method of manufacturing the intake / exhaust port 16 and its vicinity in this embodiment will be described.
First, both ends of the main body 32 of the connection piece 31 are fitted to one end and the other end of the seal portion 11 of the weather strip precursor 8, and the weather strip precursor 8 and the connection piece 31 are annularly connected. It

Next, as shown in FIGS. 7 and 9, of the weather strip precursor 8 and the connecting piece 31 which are annularly connected, the intake / exhaust port 16 and its vicinity are set in the mold 33. However, at this time, the piece main body 32 fitted to the seal portion 11 protrudes from the mold 33. Then, the weather strip precursor 8 on both sides of the die 33 is firmly clamped together with the piece main body 32 by the clampers 34 and 35. Then, both ends of the piece body 32 are closed.

In this state, air is fed under pressure from the air feeding device. Then, as shown by the arrow in the figure, air is pressure-fed from the intake / exhaust port 16, and the air is press-fitted inside the piece body 32. At this time, since both ends of the piece body 32 are closed by the clampers 34 and 35,
Tension is applied to the connection piece 31 and a part of the seal portion 11. Then, the connection piece 31 and a part of the seal portion 1
With the tension applied to No. 1, the melted EPDM solid rubber is injected and filled in the cavity 25. After the molding is completed, the press-fitting of air into the connection piece 31 is released. Thus, as in the first embodiment, the weather strip 6 is annular and has the intake and exhaust ports 16.
Is obtained.

When the EPDM solid rubber is coated and molded, the flow pressure of the rubber is changed to the piece body 32.
Added to. However, in this embodiment, the piece body 32
Since the tension is given to the by the press-fitting of air,
The piece body 32 has rigidity. Therefore, even if the flow pressure of the rubber is applied to the piece body 32, the piece body 32 is hardly deformed, and the deformation of the piece body 32 may block the gas passage when the weather strip 6 is used. There is no.

At the stage of using the weather strip 6, the connection piece 31 has flexibility because the press-fitting of air into the connection piece 31 has already been released. Therefore, the weather strip 6 has the piece body 32.
It is possible to easily bend or swell even in the portion where the present is present, and it is possible to obtain the same effect as that of the first embodiment that sufficient sealing performance can be secured even at high speed running.

The present invention is not limited to the above-described embodiments, but may be implemented as follows with a part of the configuration appropriately modified without departing from the spirit of the invention. (1) In the first embodiment, the left and right side portions of the piece main body 15 are formed thick so that the weather strip 6 has rigidity in the non-pressing direction and flexibility in the pressing direction. Although the portion is formed to be thin, the following configuration may be used in addition to the above. That is, as shown in FIG. 10, for example, the thickness of the piece body 41 may be made uniform, and the left and right side portions of the piece body 41 may be formed of hard resin and the upper and lower portions may be formed of soft resin. .

(2) In the second embodiment, the air pumping device is used to pump air into the intake / exhaust port 16.
Other gas (nitrogen, argon, etc.) may be pressure-fed. Alternatively, a liquid such as water may be pressure-fed.

(3) In the second embodiment, the piece body 3
2 was formed to have almost the same wall thickness at any position, but the wall thickness may not be uniform as long as it has flexibility as a whole.

(4) In each of the above embodiments, EPDM solid rubber was used as the material of the weather strip precursor 8 and PVC was used as the material of the connection pieces 9 and 31. It is not particularly limited, and may be changed as appropriate according to the intended use.

(5) Although the weather strip 6 is mounted around the sliding roof 4 in each of the above embodiments, the weather strip 6 may be provided in the opening 3 of the ceiling 2.

[0044]

As described above in detail, according to the method for manufacturing a weather strip intake / exhaust port of the present invention, the connecting piece having the intake / exhaust port is connected in an annular shape and at least the fitting thereof is performed. In a weatherstrip in which a polymer material is coated / molded on the joint part, it is possible to reliably prevent the deformation of the connecting piece during the coating / molding of the polymer material, and when using the weatherstrip. There is an excellent effect that it is possible to prevent the deterioration of the sealing performance.

[Brief description of drawings]

FIG. 1 shows a first embodiment of the first invention,
It is sectional drawing of a metal mold | die which shows the state which installed the connection piece.

FIG. 2 is a partial perspective view showing a sliding roof provided on a ceiling portion of an automobile in the first embodiment.

FIG. 3 is a partial sectional view showing a sliding roof in the first embodiment.

FIG. 4 is a partial perspective view showing an intake / exhaust port of the weather strip and its vicinity in the first embodiment.

FIG. 5 is an exploded perspective view showing a state in which the weather strip precursor and the connection piece are connected in the first embodiment.

FIG. 6 is a sectional view showing a state in which rubber is filled in a cavity of a mold in order to form a covering portion in the first embodiment.

FIG. 7 shows a second embodiment embodying the second invention,
It is sectional drawing of a metal mold | die which shows the state which installed the connection piece.

FIG. 8 is a perspective view showing a connection piece according to a second embodiment.

FIG. 9 is a partial plan view showing a mold and the like for forming a connection piece and a covering portion in the second embodiment.

FIG. 10 is a sectional view showing a connection piece according to another embodiment of the first invention.

FIG. 11 is a partial cross-sectional view showing a sliding roof in the related art.

FIG. 12 is a partial perspective view showing a state where a connection piece is fitted to a weather strip precursor in the prior art.

FIG. 13 is a cross-sectional view of a mold showing a state in which a connection piece is installed in the conventional technique.

[Explanation of symbols]

8 ... Weather strip precursor, 9, 31 ... Connection piece,
11 ... Seal part, 15, 32, 41 ... Piece body, 16
Intake and exhaust ports, 26 ... Support rods.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification number Reference number within the agency FI Technical indication location // B29L 31:26 4F 31:58 4F (72) Inventor Wattori Wataru Kasuga-cho, Nishikasugai-gun, Aichi Ochiai character Nagahata No. 1 in Toyoda Gosei Co., Ltd. (72) Inventor Yu Ito Kasuga-cho, Nishikasugai-gun, Aichi Ochiai character Nagahata No. 1 in Toyoda Gosei Co., Ltd.

Claims (2)

[Claims] 1. A long strip-shaped weather strip precursor (8) having a hollow seal portion (11) is provided in a non-contact direction with respect to one end and the other end of the seal portion (11). Is a cylindrical piece body (15, 41) having rigidity and flexibility in the pressure contact direction, and the piece body (15, 41)
The weather strip precursor (8) is obtained by fitting both ends of the piece body (15, 41) of the connection piece (9) provided with the intake and exhaust ports (16) projecting in a cylindrical shape from the And a step of annularly connecting the connection piece (9), the tip of which abuts the inner wall of the piece body (15, 41) inside the intake / exhaust port (16), and the base end of which is the intake / exhaust. Inserting the support rod (26) so as to project from the mouth (16), and fixing the support rod (26) in the inserted state; and the support rod (26) being inside the intake / exhaust port (16). Fixed to the step of molding a polymer material at least in the fitting part between the seal part (11) and the piece body (15, 41), and after the completion of the molding, Step of withdrawing the support rod (26) from the inside of the mouth (16) Weather strip intake and exhaust opening method of manufacturing, characterized by comprising a. 2. A weather strip precursor (8), which is formed in an elongated shape and has a hollow seal portion (11), has flexibility with respect to one end and the other end of the seal portion (11). A tubular piece body (32) and the piece body (32)
The weather strip precursor (8) and the weather strip precursor (8) and the connection piece (31) provided with a suction port (16) protruding in a cylindrical shape from the above are fitted to both ends of the piece body (32). A step of annularly connecting the connection piece (31), and the piece body (3) fitted to the seal portion (11)
A step of pressurizing a gas or a liquid from the intake / exhaust port (16) to apply tension to the connection piece (31) and the seal part (11) in a state in which substantially both ends of 2) are closed; (31) and the seal portion (11) are tensioned, at least the seal portion (1
1) A step of covering the fitting portion of the piece body (32) with a polymer material and molding, and a step of releasing the press-fitting of gas or liquid into the connection piece (31) after the molding is completed. And a method for manufacturing a weather strip intake / exhaust port.